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<A href="introduction6.htm">Debugging Tools for Windows (WinDbg, KD, CDB, NTSD)</A> &gt; <A href="debugging_resources.htm">Debugging Resources</A> &gt; <A href="debugger_engine_and_extension_apis.htm">Debugger Engine and Extension APIs</A> &gt; <A href="using_the_debugger_engine_api.htm">Using the Debugger Engine API</A> &gt; <A href="debugger_engine_reference.htm">Debugger Engine Reference</A> &gt; <A href="structures_and_constants.htm">Structures and Constants</A> &gt; </div>
	<div id="winchm_template_title">HRESULT Values</div>
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	<div id="winchm_template_content"><div id="mainSection"><p>The following is a list of common return values for functions and methods, and their usual meanings.</p>
<h2><a id="ddk_return_values_dbx"></a><a id="DDK_RETURN_VALUES_DBX"></a></h2>
<p><b>Successful results.</b>  These values are defined in WinError.h.</p>
<p></p>
<dl>
<dt><a id="S_OK"></a><a id="s_ok"></a>S_OK</dt>
<dd>
<p>Successful completion.</p>
</dd>
<dt><a id="S_FALSE"></a><a id="s_false"></a>S_FALSE</dt>
<dd>
<p>Completed without error, but only partial results were obtained.</p>
<p>If a buffer is not large enough to hold the information that is returned to it, the returned information is often truncated to fit into the buffer and S_FALSE is returned from the method.</p>
</dd>
</dl>
<p><b>Error results.</b>  These values are defined in WinError.h.</p>
<p></p>
<dl>
<dt><a id="E_FAIL"></a><a id="e_fail"></a>E_FAIL</dt>
<dd>
<p>The operation could not be performed.</p>
</dd>
<dt><a id="E_INVALIDARG"></a><a id="e_invalidarg"></a>E_INVALIDARG</dt>
<dd>
<p>One of the arguments passed in was invalid.</p>
</dd>
<dt><a id="E_NOINTERFACE"></a><a id="e_nointerface"></a>E_NOINTERFACE</dt>
<dd>
<p>The object searched for was not found.</p>
</dd>
<dt><a id="E_OUTOFMEMORY"></a><a id="e_outofmemory"></a>E_OUTOFMEMORY</dt>
<dd>
<p>A memory allocation attempt failed.</p>
</dd>
<dt><a id="E_UNEXPECTED"></a><a id="e_unexpected"></a>E_UNEXPECTED</dt>
<dd>
<p>The target was not accessible, or the engine was not in a state where the function or method could be processed.</p>
</dd>
<dt><a id="E_NOTIMPL"></a><a id="e_notimpl"></a>E_NOTIMPL</dt>
<dd>
<p>Not implemented.</p>
</dd>
<dt><a id="HRESULT_FROM_WIN32_ERROR_ACCESS_DENIED_"></a><a id="hresult_from_win32_error_access_denied_"></a>HRESULT_FROM_WIN32(ERROR_ACCESS_DENIED)</dt>
<dd>
<p>The operation was denied because the debugger is in <a href="#Bookmark179">Secure Mode</a>.</p>
</dd>
</dl>
<p><b>NT error results.</b>  Other error codes, such as STATUS_CONTROL_C_EXIT and STATUS_NO_MORE_ENTRIES, can sometimes occur.  These results are passed to the HRESULT_FROM_NT macro that is defined in WinError.h before being returned.</p>
<p><b>Win32 error results.</b>  Other error codes, such as ERROR_READ_FAULT and ERROR_WRITE_FAULT, can sometimes occur.  These results are passed to the HRESULT_FROM_WIN32 macro that is defined in WinError.h before being returned.</p>
<h2>Requirements</h2>
<table>
<tr>
<th width="30%">
<p>Header</p>
</th>
<td width="70%">
<dl>
<dt>DbgEng.h (include DbgEng.h)</dt></dl></td></tr></table></div></div>	
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